Estudo sobre abrigos naturais dos phlebotominae (Diptera: Psychodidae) nas reserva florestal Adolfo Ducke, Manaus, AM, Brasil

Abstract

During a period of 6 months, covering part of the beginning and end of the seasons of greater and lesser rainfall (February, March, April and July, August and September), collections were carried out in the Reserva Florestal Ducke (Manaus, AM), in order to know some of the ecological aspects of the sand fly fauna in that area, determining some of the natural shelters (trees and burrows of wild mammals) that are used by these dipterans during the day. Sapopem roots, tree bases, the external surface of termite mounds and tree crevices were considered as shelters. A total of 3299 sand flies (2054 and 12449) belonging to the subgenera Nyasoiayia, Helcocyrtomyia, Psychodopygur, Trichophoromyia and shannoni group were collected. The greatest number of sandflies as well as the great diversity were collected in buttress roots (53%), followed by tree bases (26%), termite mounds (15%) and, finally, crevices (3%). Dinisa exelsa was the forest species that harbored the greatest diversity and number of sandflies, while Geissospermum sp. harbored the smallest number and a single sand fly species. Lutzomyia umbratilis was the most abundant species in tree biotopes, followed by the shannoni group; while L.abonnenci, L.amazonensis, L.choti and L. furcata had the lowest number (wool). Specimens of Brumptomyia pintoi were found in only 1 burrow out of 50 surveyed for sandfly collections.